Water tank



FIG. 1 is a perspective view of a water tank constructed in accordance with the invention;

FIG. 2 is a top plan view of the water tank shown in FIG. 1;

FIG. 3 is a bottom plan view of the water tank shown in FIG. 1;

FIG. 4 is a right side elevational view of the water tank shown in FIG. 1;

FIG. 5 is a left side elevational view of the water tank shown in FIG. 1;

FIG. 6 is a front elevational view of the water tank shown in FIG. 1; and,

FIG. 7 is a rear elevational view of the water tank shown in FIG. 1. 

The ornamental design for a water tank, as shown and described. 